Only about 16 percent of U.S. adolescents have been fully vaccinated against human papillomavirus (HPV) by the time they turn 13, despite national recommendations that call for vaccination at 11 to 12 years of age. Published ...

In Japan, an HPV vaccination program started in 2010, and the HPV vaccine became a nationally recommended routine immunization for girls aged 12–16 years in April 2013. However, because cases of young girls with widespread ...

A study examining the effect of a video educational intervention aimed at increasing HPV vaccinations among adolescents could help the Centers for Disease Control and Prevention meet its goal of getting more eligible adolescents ...

A study that helps explain why anti-vaccine attitudes still persist, despite clear evidence on the benefits of immunization to public health has been selected by an international scientific committee to be given the Atlas ...

Each year, particularly during the winter months, millions of Americans are infected with influenza. The flu causes symptoms such as fever, coughing, body aches and fatigue, and, in some cases, can lead to serious complications ...

Dear Mayo Clinic: I am 28 and healthy. I have never gotten a flu shot and have never had the flu. Do I really need a flu vaccination? My employer is recommending it for everyone, but I am hesitant. I have heard some people ...

Jan 14, 2019

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Vaccine

A vaccine is a biological preparation that improves immunity to a particular disease. A vaccine typically contains a small amount of an agent that resembles a microorganism. The agent stimulates the body's immune system to recognize the agent as foreign, destroy it, and "remember" it, so that the immune system can more easily recognize and destroy any of these microorganisms that it later encounters.

Vaccines can be prophylactic (e.g. to prevent or ameliorate the effects of a future infection by any natural or "wild" pathogen), or therapeutic (e.g. vaccines against cancer are also being investigated; see cancer vaccine).

The term vaccine derives from Edward Jenner's 1796 use of the term cow pox (Latin variolæ vaccinæ, adapted from the Latin vaccīn-us, from vacca cow), which, when administered to humans, provided them protection against smallpox.

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